Prestack longitudinal wave and transverse wave combined inversion method based on rapid simulated annealing

2014 
The invention discloses a prestack longitudinal wave and transverse wave combined inversion method based on rapid simulated annealing by use of information of longitudinal waves and transverse waves. By use of conversion of longitudinal wave and transverse wave data, the speed of transverse waves is obtained through calculation, a natural acquisition presetack reflection data body is drawn to form angle gathers of different angles according to incident angles, and PP and PS wave prestack combined inversion is carried out. According to the invention, the inversion longitudinal wave impedance match is good, through observation of the error analysis of a data synthetic angle gather and an inversion data synthetic angle gather, it is indicated that the two angle gathers match well, a prestack PP and PS wave combined random inversion algorithm has quite high precision, and it is demonstrated that inversed longitudinal wave and transverse wave impedance profiles and Vp/Vs profiles have quite good corresponding relations with earthquake data and logging data.
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